Question

64乘0.25乘0.5乘1.25用脱式计算

Answer 1

1、直接写出得数。0.45×2.5＝1.1250.8×1.25＝10.3×3.6＝1.080.3×0.3＝0.0910×0.07＝0.70.92×0.4＝0.3680.2×0.26＝0.0520.14×4＝0.560.02×0.1＝0.0021.2×0.3＝0.362.5×0.4＝12.4×5＝120.22×4＝0.883.25×0＝00.9－0.52＝0.383.99×1＝3.990×3.52＝012.5×8＝1008÷10=0.810-1.8-7.2=10.43+3.57=42.5×4×12=1440.9×0.8=0.727.5x-3x=4.5xa+3a+7a==11a1.05×100=1051÷0.5=20.96÷3=0.320.56×100=563.78×100=3784÷0.8=53.215×100=321.50.8×10=84.08×100=4081.1×0.2=0.220.6×0.8=0.483×0.9=2.72.5×0.4=10.16×5＝0.81.78＋2.2=3.981.2×0.5-0.4=0.20.7÷0.01=702.5×0.4=112－3.9=8.11.25×8÷1.25=86.6÷0.66=105.37×0+4.63=4.633.9＋2.03＝5.937.2＋2.8＝101.4×5=72、用竖式计算0.18×15=0.025×14=3.06×36=0.04×0.12＝3.84×2.6≈5.76×3＝（保留一位小数）16.9÷0.131.55÷3.93.7×0.01613.76×0.8=5.2×0.68.4×1.36.4×0.54.48×0.45.25×535.4×4.20.042×0.540.76×0.320.12×0.5×0.16＝4.8×0.25＝0.125×1.4≈（保留两位小数）2.5÷0.7=（保留三位小数）10.1÷3.3=（商用循环小数）10.75÷12.5=（用乘法验算）3.25×9.04=（用除法验算）3、脱式计算（能简算的要简算）2.5×7.1×416.12×99＋16.125.2×0.9＋0.97.28×99+7.284.3×50×0.264－2.64×0.526×15.7＋15.7×24(2.275＋0.625)×0.283.94+34.3×0.21.2×(9.6÷2.4)÷4.88.9×1.1×4.72.7×5.4×3.93.6×9.85-5.468.05×3.4+7.66.58×4.5×0.92.8×0.5+1.5832＋4.9－0.94.8－4.8×0.5(1.25－0.125)×84.8×100.156.5×99＋56.57.09×10.8－0.8×7.094.85+0.35÷1.48.7×17.4-8.7×7.412.5×0.4×2.5×80.87×3.16+4.649.5×1010.68÷（5.2-3.5）×1.2540.5÷0.81×0.184.8×（15÷2.4）2．13.×0.×82576.81+6.81×990.25×185×404.4×0.8－3.4×0.8(9.37+9．37+9．37+9．37)×2．54．2.×1.＋1.×1.752.37×6.3+2.37×3.72.5×1.25×0.323.8×10.12.5×(3.8×0.04)7.69×1013.8×10.10.25×39+0.250.125×7246×0.33+54×0.33(8×5.27)×1.256.81+6.81×990.25×185×406.8×0.75÷0.53.75÷0.125–2.751.53+23.4÷7.29.5×9913.5×0.9812.5×8.8补充回答：脱式计算（能简算的要简算）7.28×99+7.284.3×50×0.264－2.64×0.526×15.7＋15.7×24(2.275＋0.625)×0.283.94+34.3×0.21.2×(9.6÷2.4)÷4.8

Answer 2

64x0.25x0.5x1.25
=4x2x8x0.25x0.5x1.25
=(4x0.25)x(2x0.5)x(8x1.25)
=1x1x10
=10

Answer 3

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